考虑混凝土表层与内部差异的氯离子非匀质渗透研究

项目名称： 考虑混凝土表层与内部差异的氯离子非匀质渗透研究

项目编号： No.51208235

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 林玮

作者单位： 江苏省建筑科学研究院有限公司

项目金额： 25万元

中文摘要： 氯离子由表及里的渗透行为定量研究是实现混凝土结构服役寿命预测、设计与提升的理论基础之一。目前的研究在很大程度上考虑了影响氯离子侵入混凝土的环境因素，并考虑了混凝土自身性能随时间的变化规律，而对于侵入方向上的混凝土渗透性能采用了表观化与平均化的简化手段，忽略混凝土材料结构和性能在空间上的差异。然而，表层混凝土与内部在性能与微结构上存在着一定的差异，并且这种差异随着混凝土表面处理与强化技术的出现与应用呈现加剧的趋势。本项目拟在明晰混凝土表层影响深度及其与内部在氯离子渗透性能差异的基础上，阐明表层的存在对混凝土整体氯离子渗透行为的影响及机理，建立包含表层在内的混凝土材料整体的氯离子非匀质渗透数学模型，为混凝土表层强化技术提供理论支撑，为混凝土结构耐久性的提升提供指导。

中文关键词： 混凝土；渗透性；表层；耐久性；

英文摘要： The quantitative study of the chloride ion penetration behavior from the surface into concrete is one of the theoretical foundation for the prediction, design and promotion of the concrete structure's service life. The environmental factors and the viriation of the permeability coefficient with age have been taken into account in existing research results. However, most of the study used apparent and average value to describe the concrete pereability along the diffusion direction. Thus, the difference of the material structure and property on space were ignored. Meanwhile, the difference of property and structure between the surface layer and the inner part of the concrete was presented by many researchers. And the difference becomes unignorable with the development and application of concrete surface treatment and inhancement technology. Current proposal plans to interpret the influence and mechanism of the sureface on the chloride ion penetration behavior into the concrete based on the difference between the surface and the inner. Mathmetical model should be established to describe the heterogeneous chloride penetration behavior of the concrete with surface lay structure to provide theoretical supporting and guide to concrete surface treatment and inhancement technology and promotion of concrete structure's se

英文关键词： concrete；permeability；surface layer；durability；